According to Finnish media outlet, Iltalehti, they've learned that the 35-year-old goaltender has decided to retire from professional hockey after parts of 17 seasons in Europe and North America.
Iltalehti are also reporting that Koskinen was supposed to return to Finland for the 2024-25 season and play for Kiekko-Espoo, however, that won't happen now.
The Vantaa, Finland native was originally drafted by the New York Islanders 31st overall in 2009, appearing in four games for them during the 2010-11 season. After parts of three seasons with the Islanders' organization, Koskinen would return to Europe where his career took off in a big way while playing in the KHL.